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文摘
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中国科学院广州地球化学研究所(GIGCAS)大气CO_2观测点的数据显示:2010年10月至2011年11月,该站点大气CO_2浓度变化范围为460~550 mL/m~3,月平均浓度介于470~530 mL/m~3之间,呈现夏、秋季浓度低,春、冬季浓度较高的特点。大气CO_2的δ~(13)C值变化介于–9.00‰~–13.10‰之间,月平均值介于–9.60‰~–11.80‰之间,与大气CO_2浓度之间关系不显著,反映了人类活动对城市大气CO_2的影响。GIGCAS站点大气CO_2的Δ~(14)C值波动剧烈,介于29.1‰~–85.2‰之间,月平均值波动范围为4.9‰~–41.7‰,年平均大气CO_2的Δ~(14)C值为–16.4‰。较高的Δ~(14)C值出现在夏、秋两季(7~9月),均值约为–5.2‰,较低的Δ~(14)C值出现在冬、春两季(12月至次年4月)、均值约为–27.1‰,据此计算得出的化石源CO_2浓度变化范围为1~58 mL/m~3,年平均值约24 mL/m~3,较低的大气化石源CO_2浓度出现在夏、秋两季(7~9月),均值为17 mL/m~3,较高大气化石源CO_2量出现在冬、春两季(12月至次年4月),均值约为29 mL/m~3。气象条件和人类活动对城市大气化石源CO_2浓度影响巨大,调整人类活动是减少大气化石源CO_2污染的途径之一。 |
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其他语种文摘
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During October 2010 to November 2011, the urban atmospheric CO_2 concentration observed in Guangzhou Institute of Geochemistry, Chinese Academy of Sciences in Guangzhou ranges from 550 mL/m~3 to 460 mL/m~3, with the monthly mean concentration fluctuating between 530 mL/m~3 and 470 mL/m~3. It shows lower concentrations in summer and autumn, and higher concentrations in spring and winter. The CO_2 δ~(13)C values vary between –9.00‰ and –13.10‰, with the monthly mean values fluctuating between –9.60‰ and –11.80‰. The relationship between CO_2 concentration and δ~(13)C values is not significant, reflecting the influence from human activities on the urban atmospheric CO_2. The Δ~(14)C values of urban atmospheric CO_2 in Guangzhou fluctuate dramatically from 29.1‰ to –85.2‰, with an annual mean value of about –16.4‰. The monthly mean Δ~(14)C values vary between 4.9‰ and –41.7‰. The higher Δ~(14)C values mainly appear in summer and autumn (July to September), and the mean value is about –5.2‰, while, the lower Δ~(14)C values mainly appear in spring (December to April next year) and winter, with an average value of about –27.1‰. According to the Δ~(14)C values, fossil fuel-derived CO_2 concentrations are calculated ranges from 1 mL/m~3 to 58 mL/m~3, with the annual mean concentration of about 24 mL/m~3. Correspondingly, the lower fossil fuel-derived CO_2 concentrations appear in summer and autumn (July to September) and the mean value is about 17 mL/m~3, while, the higher fossil fuel-derived CO_2 concentrations appear in spring and winter (December to April next year) and the average value is about 29 mL/m~3. Weather conditions and human activities play an important role on the fuel-derived CO_2 contributed to urban atmospheric CO_2. It is feasible that human can reduce the degree of fuel-derived CO_2 pollution in urban atmosphere in Guangzhou through adjusting human activities. |
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来源
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地球化学
,2013,42(4):297-306 【核心库】
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关键词
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城市大气CO_2浓度
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Δ~(14)C
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化石源CO_2浓度
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季节变化
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人类活动
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广州
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地址
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1.
中国科学院广州地球化学研究所, 同位素地球化学国家重点实验室, 广东, 广州, 510640
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中国科学院广州地球化学研究所, 同位素地球化学国家重点实验室;;物理与核技术国家重点实验室, 广东, 广州, 510640
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香港大学地球科学学院, 香港, 999077
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北京大学, 核物理与核技术国家重点实验室, 北京, 100871
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0379-1726 |
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学科
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大气科学(气象学);地质学 |
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基金
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国家自然科学基金
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国家973计划
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中国科学院知识创新工程项目
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文献收藏号
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CSCD:4928368
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